中国铁道科学2018，Vol.39Issue(2)：28-36,9.DOI:10.3969/j.issn.1001-4632.2018.02.04
大跨多线高速铁路钢桁拱桥车—桥振动安全预警研究
Research on Safety Early Warning of Vehicle-Bridge Vibration for Long-Span Multi-Track Steel-Truss Arch Bridge of High Speed Railway
摘要
Abstract
Based on the health monitoring system of the Nanjing Dashengguan Yangtze River Bridge,the vibration responses of the long-span multi-track railway bridge are online identified under the operation conditions of G-series high-speed train.According to the features that the vibration acceleration amplitude of the long-span multi-track railway bridge has significant peak at one or more train-speed points,a safety early warning method of vehicle-bridge vibration is put forward using wavelet packet decomposition and interval estimation theory.Based on the correlation features between the amplitude of bridge vibration acceleration response and the speed of G-series high-speed train under different operation conditions,the median line on the coordinates of bridge acceleration amplitude versus train speed is gained using wavelet packet decomposition method which reflects the amplitude of bridge vibration acceleration varying with train speed.The fluctuation interval of acceleration amplitude around the median line is obtained using interval estimation theory which reflects the influence of the carrying capacity of train on in-service bridge,track irregularity,and other random factors on the vehicle-bridge vibration.Finally,the safety early warning of vehicle-bridge vibration is achieved for the in-service long-span multi-track steel-truss-arch high speed railway bridge based on the median line of acceleration amplitude versus train speed and the fluctuation interval of acceleration amplitude.关键词
大跨多线钢桁拱桥/桥梁健康监测/车—桥振动/小波包分解/区间估计/安全预警Key words
Long-span multi-track steel-truss arch bridge/Bridge health monitoring/Vehicle-bridge vibration/Wavelet packet decomposition/Interval estimation/Safety early warning分类
交通工程引用本文复制引用
赵瀚玮,丁幼亮,李爱群,王蔓亚,刘华,岳青..大跨多线高速铁路钢桁拱桥车—桥振动安全预警研究[J].中国铁道科学,2018,39(2):28-36,9.基金项目
国家自然科学基金资助项目(51578138) （51578138）
中国铁路总公司科技研究开发计划项目(2015G006-J) （2015G006-J）
中央高校基本科研业务费专项资金和江苏省普通高校研究生科研创新计划项目(KYLX16_0251) （KYLX16_0251）
东南大学优秀博士学位论文培育基金项目(YBJJ1657) （YBJJ1657）
